Guarantees (Details 2)	Sep. 30, 2022 USD ($)
Guarantor Obligations [Line Items]
Guarantor obligations, maximum exposure, undiscounted	$ 333,700,000
Fixed maximum amounts guaranteed by year 2022	10,800,000
Fixed maximum amounts guaranteed by year 2023	68,600,000
Fixed maximum amounts guaranteed by year 2024	110,600,000
Fixed maximum amounts guaranteed by year 2025	130,500,000
Fixed maximum amounts guaranteed by year 2026	1,300,000
Fixed maximum amounts guaranteed, thereafter	700,000
No scheduled maturity date	11,200,000
Amount outstanding under guarantees that is reflected on balance sheet	0
Letters of credit	25,000,000
Letters of credit set to expire - 2022	21,800,000
Letters of credit set to expire - 2023	2,700,000
Letters of credit set to expire - 2024	500,000
Outstanding letters of credit	0
Amount of surety bonds outstanding	$ 932,400,000